Charybdis (Archias) hongkongensis Shen, 1934

Arzivian, Arteen, Alrubaie, Ahmad, Yang, Jessica, Lin, Huiyu, Zhang, Eva & Leong, Rupert, 2022, Crabs (Crustacea, Decapoda) from the Seas of East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 4. South China Sea, Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (4), pp. 147-191 : 164

Charybdis (Archias) hongkongensis Shen, 1934

( Fig. 8 )

Material examined. RV Hakuhō Maru KH-72-1 cruise, sta. 42, 1Ə (CB 36.7×CL 25.7 mm), NSMT-Cr 30919.

Remarks. Takeda (2019) recorded one male and two females of this species as Charybdis (Goniohellenus) , with photographs, from off Hong Kong, and mentioned the differences from the closely related congeneric species, C. (A.) truncata (Fabricius, 1798) , following Shen (1934) and Leene (1938). The shape of the six frontal lobes is somewhat variable and so more emphasised in the present male ( Fig. 8A ), as useful to discriminate C. (A.) hongkongensis from congeners.

Distribution. Taiwan; Hong Kong; coasts of China; Sunda Strait, Madura Strait, Banda Sea; Andaman Sea. Bathymetric range is 15–60 m as summarized by Takeda (2019), with an exceptional depth record of 397 m by Leene (1938) in the Banda Sea. Chen (1998a) recorded this species from the Nansha Islands at the depths of 74 and 102 m.

Figures

Fig. 8. Charybdis (Archias) hongkongensis Shen, Ə (NSMT-Cr 30919; CB 36.7×CL 25.7mm) from sta. 42. Dorsal view (A), right chela in lower view (B), left chela in outer view (C), pleon (D), and G1s in situ (E).